Bug 2571627

Summary: CVE-2026-124743 busybox: Divide-by-zero and heap over-read in the volume_id HFS+ prober [epel-all]
Product: [Fedora] Fedora EPEL Reporter: Vladimir Vasilev <vvasilev>
Component: busyboxAssignee: Tom "spot" Callaway <spotrh>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: epel10CC: admiller, davide, dvlasenk, epel-packagers-sig, spotrh, suraj.ghimire7
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["97a5b5b6-157d-4f0b-ade8-617e1c0c9600"]}
Fixed In Version: Doc Type: ---
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Documentation: --- CRM:
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2571624    

Description Vladimir Vasilev 2026-11-11 09:56:36 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

A flaw was found in BusyBox's volume_id HFS+ prober. A blocksize value of 0 in the volume header is used as a divisor, causing a divide-by-zero (SIGFPE) crash, and the catalog leaf_node_size is never validated, allowing a heap out-of-bounds read. A crafted HFS+ filesystem image on an attached device triggers these issues when probed by blkid, findfs or mount LABEL=/UUID=, causing the probing applet to crash and preventing device resolution.